511 owners - diff covers ?

[Rich D]

Hi Guys

My 511 should shortly be here so im getting together the final bits and bobs to make it right from the off.

I have bought most of the option parts recommended on the TRF Racing website but havent yet taken the plunge with the diff covers. Are they a luxury or a necessity ?

Also, whats the difference between the long and short versions ? Do i need one for the front and one for the rear ?

Thanks !